USAP-DC

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Two-year velocity and strain-rate averages from the Thwaites Eastern Ice Shelf, 2001-2020 Data DOI: https://doi.org/10.15784/601478 Cite as Alley, K., Klinger, M., Muto, A., Pettit, E. C., Scambos, T., Truffer, M., et al. (2021) "Two-year velocity and strain-rate averages from the Thwaites Eastern Ice Shelf, 2001-2020" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601478. AMD - DIF Record(s) USAP-1929991_1 Abstract This dataset includes GeoTiffs of two-year averages of ice flow velocity (including x- and y-components and flow speed) and longitudinal, transverse, and shear strain rates for the Thwaites Eastern Ice Shelf (TEIS) from 2001-2020. The grids were derived from feature tracking on MODIS, Landsat-7, and Landsat-8 imagery. Each pixel in a grid represents the median value of a stack of all available pixels for each time period. Data are gridded at a 500 m spatial resolution in a polar stereographic (EPSG:3031) projection. Speed units are m/day and strain rates are in units of /day. In addition, we provide videos of each variable (excluding x- and y-velocity components) placed alongside a MODIS image of the same extent and from around the same time to provide context. In addition to the variables noted above, we include videos for flow direction (in degrees from grid north in an EPSG:3031 projection) and a zoomed-in version of flow direction, which were calculated from the provided grids. Creator(s): Alley, Karen; Wild, Christian; Scambos, Ted; Muto, Atsu; Pettit, Erin; Truffer, Martin; Wallin, Bruce; Klinger, Marin Date Created: 2021-10-11 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -114, East: -104, South: -76, North: -74 Temporal Extent(s) Start: 2001-12-21 - End: 2020-12-21 Award(s) NSF 1738992 Version: 2 Related Project(s) NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment Keywords Antarctica Glaciology Ice Shelf Ice Velocity Strain Rate Thwaites Glacier